foretaste detail先尝
foretaste of material to come伏笔
N-COUNT（可数名词） If you describe an event as a foretaste of a future situation, you mean that it suggests to you what that future situation will be like. 预示 [usu 'a' N 'of' n]
It was a foretaste of things to come.
这是未来之事的预演。